You can do arbitrary processing of radio signals, from basic FM radio decoding to interpreting images of the earth from space sent by satellites. You can also f

You can do arbitrary processing of radio signals, from basic FM radio decoding to interpreting images of the earth from space sent by satellites. You can also figure out the protocol for toy RF cars / boats and control them from whatever software you like. It's a really powerful and cool way to explore the EM spectrum around you right now.